ISO 1736-2008 PDF

Full title and description

ISO 1736:2008 — Dried milk and dried milk products — Determination of fat content — Gravimetric method (Reference method). This International Standard specifies a gravimetric (reference) procedure for determining fat content in dried milk and related powdered dairy products.

Abstract

ISO 1736:2008 defines the reference gravimetric method for measuring fat content in dried milk and dried milk products (including whole, partially skimmed and skimmed milk powders, dried whey, dried buttermilk and dried butter serum). The method is not applicable to powders that contain hard lumps which do not dissolve in ammonia solution or that contain significant quantities of free fatty acids; such products require alternative techniques (for example methods using the Weibull–Berntrop principle). ISO 1736:2008 has been withdrawn and its subject matter was consolidated into the newer ISO 23318:2022.

General information

• Status: Withdrawn (edition 4, 2008); subject matter revised by ISO 23318:2022.
• Publication date: October 2008 (2008-10).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 67.100.10 (Milk and processed milk products).
• Edition / version: Edition 4 (2008).
• Number of pages: 14 (ISO published document page count).

Scope

Specifies the reference gravimetric method for the determination of fat content in dried milk and related dried dairy products. The procedure is intended for powders with relatively high fat content (examples and applicable product types are listed in the standard). It excludes products that do not dissolve properly in ammonia solution or that contain significant free fatty acids; for such cases alternate methods (e.g., Weibull–Berntrop principle methods) are recommended.

Key topics and requirements

• Gravimetric (reference) extraction and measurement of fat from dried milk powders.
• Sample preparation and dissolution guidance for dried milk and related powders.
• Limits of applicability: not suitable for powders with hard insoluble lumps or high free fatty-acid levels.
• Precision and repeatability considerations appropriate for a reference method (interlaboratory performance discussed in the standard and in successor documents).
• Guidance on when to use alternative methods (e.g., Weibull–Berntrop based procedures) for problematic matrices.

Typical use and users

Used historically as a laboratory reference method by food-testing and dairy quality-control laboratories, accreditation bodies, research institutes, standards committees, and national regulatory authorities for official fat-content determinations in dried milk products. Since the 2008 edition has been withdrawn, practitioners are advised to use the consolidated ISO 23318:2022 where applicable.

Related standards

ISO 1736:2008 was part of a family of Röse–Gottlieb/gravimetric reference methods for fat determination and has been superseded by ISO 23318:2022 (which consolidates and replaces a number of earlier ISO/IDF fat-determination standards). Related documents and alternative methods include ISO 23318:2022, the ISO 8262 series (Weibull–Berntrop principles), and several earlier ISO/IDF standards for specific product classes (for example ISO 8381, ISO 1211 and others that were consolidated into ISO 23318).

Keywords

dried milk; milk powder; fat determination; gravimetric method; Röse–Gottlieb; reference method; dried whey; buttermilk powder; ISO 1736; IDF 9.

FAQ

Q: What is this standard?

A: ISO 1736:2008 is an International Standard that specified the gravimetric (reference) method for determining fat content in dried milk and related dried dairy products.

Q: What does it cover?

A: It describes sample preparation, extraction and gravimetric measurement steps for fat determination in dried milk, dried whey, dried buttermilk and dried butter serum, and it states limitations where the method is not applicable (e.g., hard lumps, significant free fatty acids).

Q: Who typically uses it?

A: Historically used by dairy industry quality-control and testing laboratories, regulators and research bodies as a reference procedure for fat content measurement in powdered dairy products.

Q: Is it current or superseded?

A: ISO 1736:2008 is withdrawn and its scope has been superseded/consolidated into ISO 23318:2022; users should consult ISO 23318:2022 for the current, consolidated gravimetric method and applicability to additional product classes.

Q: Is it part of a series?

A: Yes — it formed part of the ISO/IDF family of fat-determination reference methods (Röse–Gottlieb and related methods). Its subject matter was later brought together in ISO 23318:2022 alongside other product-specific ISO/IDF standards.

Q: What are the key keywords?

A: gravimetric method; fat content; dried milk; milk powder; Röse–Gottlieb; reference method; IDF 9.